Old MacDonald had a farm (on a Toronto rooftop)

The view of the Toronto Skyline also includes acres upon acres of potential farmland. (Image via Wikipedia)

Green roofs are nice, but rooftop farms are better.

They’re the future of living architecture, say international green roof advocates who gathered in Toronto last week. [...]

“We have a handful of agricultural green roofs and all of them are community projects,” like Eastdale Collegiate, Ryerson’s Engineering building and the Carrot Common, said Peck. “But we don’t have any commercial-scale agriculture on roofs — that’s the next thing.”
— thestar.com